schemadata.py 文件源码

def derived_from_all(self, identities: List[QualName]) -> MutableSet[QualName]:
        """Return list of identities transitively derived from all `identity`."""
        if not identities:
            return set()
        res = self.derived_from(identities[0])
        for id in identities[1:]:
            res &= self.derived_from(id)
        return res